Step 1: Materials:
block of your choice(i used stone),bait(an ore,like diamonds),sand,and signs.
Step 2: House
build a simple house with no roof and a entering hole.
Step 3: Bait
add your bait of choice at one of the back corners.
Step 4: Sign Fuse
put a sign on your bait and put a sign on that sign. the second one shouldnt have a stick.
Step 5: Sign Fuse Pt.2
make a fuse of signs to the top of the house and make a roof out of the signs.
Step 6: Sand
put sand on top of the signs so they can cover the player.
Step 7: Explanation:
the signs are build together. so destroying the bait will destroy the signs too. and whatever sand goes up,must come down! crashing down on to the player suffocating them!